"The Habsburg king was the only element that connected the multiple kingdoms and territories, ruling by six separate government councils of Castile, Aragon, Portugal, Italy, Flanders, and the Indies."
As far as I know, the question is correct, as confirmed by England's famously long-lasting alliance with Portugal. The question will stand unless better evidence is provided.
Queen Elizabeth II's full title is "Elizabeth II, by the Grace of God, of the United Kingdom of Great Britain and Northern Ireland and of her other realms and territories Queen", so it could be argued that she is Queen of (part of) Ireland (though not all of Ireland).
My high score 11.